Cyclization of 2-(4-R-piperidino)benzaldehydes with 5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one proceeding via tert-amino effect mechanism is stereoselective. Relative configuration of (3R*,4aS*,5R*)-2,3,4,4a,5,6-hexahydro-1H-benzo[c]quinolizine was established on the base of NMR spectroscopy data and X-ray analysis.
通过叔胺效应机制进行的2-(4-R-
哌啶基)
苯甲醛与5-甲基-2-苯基-2,4-二氢-
3H-吡唑-3-酮的环化是立体选择性。 (3R*,4aS*,5R*)-2,
3,4,4a,5,6-六氢-1H-苯并[c
]喹嗪的相对构型是根据核磁共振光谱数据和X射线分析确定的。